116668021 has 2 divisors, whose sum is σ = 116668022. Its totient is φ = 116668020.

The previous prime is 116668009. The next prime is 116668031. The reversal of 116668021 is 120866611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115132900 + 1535121 = 10730^2 + 1239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-116668021 is a prime.

It is a super-2 number, since 2×116668021² = 27222854248112882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116668031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58334010 + 58334011.

It is an arithmetic number, because the mean of its divisors is an integer number (58334011).

Almost surely, 2^116668021 is an apocalyptic number.

It is an amenable number.

116668021 is a deficient number, since it is larger than the sum of its proper divisors (1).

116668021 is an equidigital number, since it uses as much as digits as its factorization.

116668021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 116668021 is about 10801.2971906156. The cubic root of 116668021 is about 488.6342937268.

The spelling of 116668021 in words is "one hundred sixteen million, six hundred sixty-eight thousand, twenty-one".